\input pstricks.tex
\input pst-node.tex
\nopagenumbers
$
\psset{linewidth=0.8pt,unit=2em,labelsep=0.5ex}
\pcline(0,0)(2,4)
\Aput{c}
\pcline(0,0)(6.5,0)
\Bput{b}
\pcline(2,4)(6.5,0)
\Aput{a}
\pcline[linewidth=0.4pt,linestyle=dashed](2,4)(2,0)
\Aput{h}
\uput[dl](0,0){A}
\uput[u](2,4){B}
\uput[dr](6.5,0){C}
$
\bye
